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Meeting Details

  • Moderator: ssm
  • Protocol: sdo
  • Attendees:
    • als
    • nre
    • rvh
    • ssm
    • lgr
    • cds
    • peu
    • kolja
    • sdo
  • Start: 16:00
  • End: 17:30


Debugging code generated from SCCharts (peu)

  • count delay is not supported by state-based lean Java code generation
  • Comment on initial state may be not correctly visualized or implemented, this is incremental update
  • On edge labels do not work for multiple labels (cds checks this)
  • Comment nodes are now also on transitions that are part of transitions of the original model
  • Original transition can be seen as a comment in the generated code
  • Current state/transition in generated code is visualized in green, they are inferred by the Javadoc/annotations on state methods and comments on transitions
  • The active SCCharts states (red) are inferred by the current state variable
  • Different kind of breakpoints for transition checked and transition taken
  • Breakpoints should be set in the debug diagram view, since it is difficult to find the correct line in te generated code
  • The diagram is only updated whenever a breakpoint is reached (stepping is an optional goal)
  • A stepping mechanism in the SCCharts level might be helpful (rvh) for stepping through transition checks and transitions, new states
    • add breakpoints on the next location the execution will continue (next state, next transition to check) and remove it afterwards to simulate stepping
  • Optional: Step into host code calls
  • Check more example with immediate transitions and more than one outgoing transition
  • It is intended to use a different view for debugging than for general diagram
  • Debug perspective for SCCharts might be helpful
  • Focus and context debugger is currently not active. It can be added to the Highlighter (als)

 New Dataflow Synthesis (circuit) (kolja)

  • Registers are now connected correctly
  • Refactor Hide local variables to Show local variables
  • Old circuit synthesis is refactored into different steps to make it maintainable
  • Assignments can be annotated as sequential
  • Constraint for sequential equations can be visualized in the diagram
  • This can also be seen in the separate assignments
  • The "seq" keyword allows to override IUR dependencies, this feature should be used for experimenting with sequentiality in dataflow
  • Arrays can be visualized in dataflow
  • Port order is not correctly (fix this)
  • Arrows in dataflow (try this) with option
  • Green line between the same instances of some referenced model
  • First actual bug in dataflow was found and documented (TODO add picture)
  • Dataflow highlighting shows what wires are true or false (true is highlighted in red)

Host code and OO (als)

  • new pragma "resource" to add new resources for compilation and in runtime for simulation
  • Host classes can be added, this can also be used to have Lists in SCCharts
  • A list can be used together with scheduling directives to behave deterministically
  • Scheduling directives in host classes can be accessed from outside the class, via <variableName>.<nameOfDirective>
  • Classes can be directly implement in SCCharts as SCL code
  • In C this is translated into structs and in Java into classes where the methods are inlined (inlining is optional and not possible for for-loops)
  • SCCharts are handled as objects/classes
  • Using the reference an SCChart can be used same as the hostcode class
  • Instead of a class definition an SCChart can be used
  • All of this works together with regions and inheritance
  • State-based does not work with the class feature
  • Sausage folding option has be moved to the correct category

Text in SVGs in KEITH (nre)

  • Every renderer renders font differently
  • SVG has option to squish the letters together (textLenght)
  • SVG has another option to squish them better (lengthAdjust)
  • Since the SVGs are rendered in Chrome they are always rendered correctly in Chrome
  • Test this for Windows and other SVG-viewers

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